We are providing you with these materials because the Board of Directors is soliciting your proxy to vote at the 2023 Annual Meeting to be held on November 27, 2023, beginning at 1:00 p.m., Pacific Time including at any postponement or adjournment thereof. The purpose of the 2023 Annual Meeting and the matters to be acted on are stated in the accompanying Notice of Annual Meeting of Stockholders. The Board of Directors knows of no other business that will come before the 2023 Annual Meeting.

Proxy Information

Thank you for being an iBio stockholder! By providing your materials to you via the internet, we are lowering our costs, contributing to a better environment, and improving accessibility.

Annual Report to Shareholders and Proxy Statement

You may view our current annual report and proxy statement here:

Voting

SUBMIT A PROXY TO VOTE BY INTERNET - https://www.cstproxy.com/ibioinc/2023

Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 P.M. Pacific Time on November 26, 2023. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form.

SUBMIT A PROXY TO VOTE BY TELEPHONE – (866) 894-0536

Use any touch-tone telephone to transmit your voting instructions and for electronic delivery of information up until 11:59 P.M. Pacific Time on November 26, 2023. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form.

ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS

If you would like to reduce the costs incurred by our Company in mailing materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronically via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet or telephone and, when prompted, indicate that you agree to receive or access materials electronically in future years.